First off, inlines are a totally different animals that side locks and different rules apply for loading and cleaning.
IF you can get Blackhorn 209 powder that is THE standard for inlines and no one has anything close.
Alliant MZ was supposed to be similar but by most reviews has not lived up to the hype. You have to compress the loads, still has a crud ring and has very mixed reviews for accuracy and consistency. Here is one review below.
Alliant MZ Powder | Doug's Message Boards
There are a variety of websites other than here that specialize in muzzleloaders and testing the new powders, primers and bullets. Highly recommend you use google them spend some time on them.
TC's tend to on the tight side bore wise and you might run into problems with bullets. The Hornady 300 gr bullet should work, also the Barnes Spitfire EZ (which is made for tighter bores), the Thor bullets (come in various dimensions) and PR bullets (Canadian) would be the ones to go to.
Most have dropped all pellets due to lack of uniformity and 777 due to the crud ring build up that limits you to one shot before cleaning the bore and the primer issues (you cannot use a standard 209 primer, you must use a lower velocity muzzle loading primer). No need with BH 209 as it can be shot hundreds of times and has more energy and takes standard 209 primers. 120 gr BH 209 is equivalent to 150 gr 777.
My TC encore with 110 BH 209 and the Barnes Spitfire took a buck two weeks ago at 235 yards.
If I could have used BH209 I would have!
I've had lots of trouble trying to import the cleaning gear which is very frustrating.
I just need to hope that the Alliant Black MZ and Hornady pills work well together or I'm in trouble!
Cabelas and similar business won't even ship Bore Butter, breach plug grease etc. to me so I'm likely going to have to make do with household items to do the job.